EXPRESSION OF PCNA, AKP AND ACP DURING DEVELOPMENT OF MOUSE FORE STOMACH CARCINOMA

Objective： To find out the relationship of the expressions of proliferating cell nuclear antigen （proliferating cell nuclear antigen, PCNA）, alkaline phosphotase （alkaline phosphotase, AKP） and acid phosphotase （acid phosphotase, ACP） with the development of mouse fore stomach cancerization. Methods： The animal models, including the various stages during the development of NIH mouse fore stomach carcinoma, were made by N-Nitrososarcosineethylester （N-Nitrososarcosineethylester, NSEE）. The mice were sacrificed on the 14th, 28th, 42nd, 56th, 70th and 84th days respectively after mice were irrigated with NSEE. The fore stomach was taken out and dissected. The methods of histopathology, immunohistochemistry and isoenzyme electrophoresis were adopted to study the dynamic changes of cell shape and expression of PCNA, AKP and ACP. Results： On the 42nd and 56th days after NSEE treatment, the expression of PCNA increased gradually along with the cancerization. Comparing with the control, there were significant differences （P〈0.05）. On the 70th and 84th days, the expression of PCNA increased further （compared with the control P〈0.01）. The activity of AKP increased gradually along with the cancerization. On the 14th, 28th, 42nd and 56th days, there were significant differences （P〈0.05）; on the 70th and 84th days, the activity of AKP increased further （P〈0.01）. The activity of ACP also increased on the 14th, 28th, 42nd and 56th days, and there were significant differences on the 70th days （P〈0.05） and on the 84th days （P〈0.01） compared with the control. Conclusion： During the carcinogenesis of NIH mouse fore stomach, the expressions of PCNA, AKP and ACP increased gradually and were consisted with the changes of cell shapes.     

微波消化技术在植物中测定微量元素的研究

本法用微波消化植物样品，通过正交试验分析获得较优的微波消化条件，用此条件对锌、铁、锰元素作添加回收试验，得回收率分别为９７．０％、９４．３％、９０．６％，变异系数分别为１．２％、４．１％、３．４％。另外，该法与国标法相比无显著性差异，通过实验分析得出...     

大学生性传播疾病知信行现状研究与对策——以郑东新区为例

目的:分析郑东新区大学生性传播疾病的知识、态度和行为现状,为开展切实可行的性与生殖健康教育提供对策建议。方法:对郑东新区463名在校大学生进行匿名问卷调查。结果:大学生的性传播疾病知识匮乏;对婚前性行为的态度相对开放,男生对性的接受程度显著高于女生;获取性相关知识的主要途径是网络和书刊。结论:对大学生开展符合时代需求的性知识教育迫切而必要,应从教师选择、教育过程、教学内容、学情和社会氛围等方面着手,改进性知识教育现状,提高学生生殖健康水平。     

猕猴体内白蛋白融合干扰素α-2b(HSA-IFNα-2b)的药代动力学研究

目的研究白蛋白融合干扰素α-2b(HSA-IFNα-2b)在猕猴体内的药代动力学。方法按照50μg.kg-1iv、50μg.kg-1sc和300μg.kg-1sc3种剂量组给猕猴注射HSA-IFNα-2b,分别在14个时间点采血,用ELISA方法测定血药浓度,计算药代动力学参数。结果3组受试猕猴均能在336h以前的各时间点测到HSA-IFNα-2b药物。一房室模型(weight=1/C2)分析药物浓度-时间曲线显示:50μg.kg-1iv、50μg.kg-1sc和300μg.kg-1sc3个剂量组的分布容积分别为67、71和63ml.kg-1。HSA-IFNα-2b皮下注射吸收相对缓慢,单剂量50μg.kg-1sc的吸收半衰期约为19h,消除半衰期为53h,清除率为0.92ml.h-1.kg-1,生物利用度达73%。结论HSA-IFNα-2b猕猴体内研究表明其药代动力学优于非融合干扰素,提示使用HSA-IFNα-2b可以减少用药次数,并有可能提高疗效。     

大鼠肝癌前病变模型血清AFP、CEA、SF、AFU和T3、T4、IGF-Ⅱ水平变化及意义

用DENA作诱癌剂,建立SD大鼠肝癌前病变模型.自诱癌之日起,分别于14、28、56、77 d取血,用放射免疫法检测血清中甲胎蛋白(AFP)、癌胚抗原(CEA)、血清铁蛋白(SF)、甲状腺激素(L3、T4)、胰岛素样生长因子Ⅱ(IGF-Ⅱ),用速率法检测血清α-L-岩藻糖苷酶(AFU)活性.结果显示,在大鼠肝癌变进程中,其血清AFP、CEA和SF的表达与对照组相比,P均>0.05,在所有的大鼠中均未检测到AFU;T3在14 d高于对照组(P<0.01),之后急剧下降,28、56、77 d显著低于对照组(P均<0.05);T4在28 d达最大值,显著高于对照组(P<0.05),此后开始下降,但在56 d仍高于对照组(P<0.01),77 d低于对照组(P<0.01);在诱癌过程中IGF-Ⅱ均高于对照组(P<0.01).认为T3、T4与肝癌的发生发展关系密切,IGF-Ⅱ作为肝癌前病变的警示信号可为肝癌的早期诊断和治疗提供理论依据.